Stickman393
Well-known member
This one turned into one hell of a time sink.
Mostly because I've made my setup pretty efficient for stompboxes, but not so much for larger format stuffs. Lots of considerations here...the sigma 11 is a linear regulated power supply. In order to share input ground with the earth ground I had to make up a little ground-loop breaker on Vero. Just a 0.1uF safety cap and a 5 watt 10 ohm resistor in parallel...input ground on one end, earth ground on the other.
This is my second time through building this one...my first time through was damned near a disaster. This one went much more smoothly, except with multiple stops and starts due to lack of components, enclosure woes, etc.
The transformer is toroidal, delivering 32v. The sigma 11 rectifies and regulates the output at 24vdc.
The headphone amp itself is class A, with three pairs of MOSFETs driving independent left, right, and ground channels. This one only requires a unipolar power supply, as it utilizes a TI rail splitter to create a "virtual ground" at the center point of the power supply. Cool stuff.
I made this one for my dad for Christmas...the drawing on the back is meant to be him and my mom, who passed earlier this year, with myself and my sister listening to him play "Old Man" by Neil Young...
Scene from a memory, basically. He's big into vinyl and hi-def stuffs...but didn't have a good headphone amp to drive his Sennheiser HD650s.
Pics!
Mostly because I've made my setup pretty efficient for stompboxes, but not so much for larger format stuffs. Lots of considerations here...the sigma 11 is a linear regulated power supply. In order to share input ground with the earth ground I had to make up a little ground-loop breaker on Vero. Just a 0.1uF safety cap and a 5 watt 10 ohm resistor in parallel...input ground on one end, earth ground on the other.
This is my second time through building this one...my first time through was damned near a disaster. This one went much more smoothly, except with multiple stops and starts due to lack of components, enclosure woes, etc.
The transformer is toroidal, delivering 32v. The sigma 11 rectifies and regulates the output at 24vdc.
The headphone amp itself is class A, with three pairs of MOSFETs driving independent left, right, and ground channels. This one only requires a unipolar power supply, as it utilizes a TI rail splitter to create a "virtual ground" at the center point of the power supply. Cool stuff.
I made this one for my dad for Christmas...the drawing on the back is meant to be him and my mom, who passed earlier this year, with myself and my sister listening to him play "Old Man" by Neil Young...
Scene from a memory, basically. He's big into vinyl and hi-def stuffs...but didn't have a good headphone amp to drive his Sennheiser HD650s.
Pics!
